TRETHEWEY, J.; ROLSTON, M. Is the flag leaf important in perennial ryegrass seed production?. NZGA: Research and Practice Series, [S. l.], v. 14, p. 67–73, 2010. DOI: 10.33584/rps.14.2008.3182. Disponível em: https://www.nzgajournal.org.nz/index.php/rps/article/view/3182. Acesso em: 19 apr. 2026.